In a social media post on Saturday, Trump, referring to himself, said the “leading Republican candidate and former president of the United States will be arrested on Tuesday of next week”.
He cited “illegal leaks” from the Manhattan district attorney’s office.
Messages left Saturday with the district attorney’s office were not immediately returned. Representatives for Trump did not immediately respond to calls for comment.
Trump did not provide any details on social media about how he knew about the expected arrest.
In his postings, he repeated his lies that the 2020 presidential election he lost to Democrat Joe Biden was stolen and he urged his followers to “Protest, take our nation back!”
That language evoked the message from the then-president that preceded the riot at the US Capitol on January 6, 2021.
Law enforcement officials in New York have been making security preparations for the possibility that Trump could be indicted.
There has been no public announcement of any time frame for the grand jury’s secret work in the case, including any potential vote on whether to indict the ex-president.
Trump’s posting echoes one made last summer when he broke the news on Truth Social that the FBI was searching his home as part of an investigation into the possible mishandling of classified documents.
The grand jury in Manhattan has been hearing from witnesses, including former Trump lawyer Michael Cohen, who says he orchestrated payments in 2016 to two women to silence them about sexual encounters they said they had with Trump a decade earlier.
Trump denies the encounters occurred, says he did nothing wrong and has cast the investigation as a “witch hunt” by a Democratic prosecutor bent on sabotaging the Republican’s 2024 presidential campaign.
Manhattan District Attorney Alvin Bragg’s office has apparently been examining whether any state laws were broken in connection with the payments or the way Trump’s company compensated Cohen for his work to keep the women’s allegations quiet.
Daniels and at least two former Trump aides — onetime political adviser Kellyanne Conway and former spokesperson Hope Hicks — are among witnesses who have met with prosecutors in recent weeks.
Cohen has said that at Trump’s direction, he arranged payments totalling $US280,000 to porn actor Stormy Daniels and Playboy model Karen McDougal. According to Cohen, the payouts were to buy their silence about Trump, who was then in the thick of his first presidential campaign